Great job! Soil will actually wick up to one foot (potting mix) - but being able to see the water level, having it's own "cloche" that fits without falling over and how easy and handy this instructable is I will be making several of these for myself. Like the idea of the paper cup, too haoran!

Can't you also just plant directly into your garden (or whatever) as the plant will break apart the cup..? hmmmm except the plastic bottle (bottom) would have to be removed first of course.. but i was thinking along the lines of the plant when ready for planting..